Armature for magneto-induction machines.



G.HONOLD. ARMATURE FOR MAGNETO INDUCTION MACHINES. APPLICATION FILED 001'. 4, 1909.

1 ,072,1 20, Patented Sept. 2, 1913.

UNITED STATES PATENT onrron.

GOTTLOB HONOLD, OF STUTTGART, GERMANY, ASSIGNOR TO THE FIRM OF ROBERT BOSCH, 10F STUTTGART, GERMANY.

ABMATURE FOB MAGNETO-INDUCTION MACHINES.

Specification of Letters Patent.

Patented Sept. 2, 1913.

Application filed October 4, 1909. Serial No. 520,931.

To all whom it may concern Be it known that I, Go'r'rLoB HoNoLD, a subject of the German Emperor, residing at 11.13 Hoppenlaustrasse, Stuttgart, Germany, have invented certain new and useful Improvements in Armatures for Magneto- Induction Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same,

This invention relates to the construction of armatures or bobbins for magneto induction machines of the type usually known as "1nagnetos. In such machines, as usually constructed, the armature or bobbin is made up of a body portion carrying the winding in which electro-motive force is induced, and two head pieces or pole piecesof magnetic material such as non or steel,

which twice in each revolution bridge across the space between the magnet faces and divert the lines of force from the path through the body of the bobbin and through the winding carried thereby. It is customary to support these bobbins, for rotation in the field, by means of two axle pins extending symmetrically from the body portion of the bobbin and suitably journaled in the frame of the machine. With such construction it is impossible to slip on to the body or coilcarrying portion of the bobbin, a previously wound coil, and when the winding is wound on to the bobbin by hand or in a lathe the winding must be so applied as to avoid the axle pins.

I11 accordance with the present invention it becomes possible to wind the coils on suitable forms and put them on the bobbins after they are wound, or to wind the coil directly on the bobbin by hand or by means of a lathe without interference from the axle pins, so that the construction of the bobbins is simplified and improved. This result is accomplished by connecting the axle pins to some part other than the coil-carrying portion of the bobbin, as, the pole pieces or extensions thereof, which pole pieces and extensions form the head-pieces. At the same time the construction is such that this result is effected without necessitating any modification of the ordinary form of fieldmagnet frame and without materially re ducing the area of the magnetic path through the bobbin.

In the accompanying drawings Figures 1, 3, 5 and 6 are side views of bobblns constructed in accordance wlth the present invention, and Figs. 2 and 4: are end views of double T form being discarded. When the bobbins are constructed in this manner their manufacture is facilitated because the bobbin and the axle pins can be forged or pressed from a single piece of malleable iron; In the construction shown in Figs. 3 and 4c the head pieces have flanges b b 0,, 0 so that the usual double T form is retained. The bobbins shown in Figs. 1, 2, 3 and 4, have a body or coil-carrying portion with its axis inclined to the axis of the axle pins, to such a degree that by mounting the bobbin in a lathe on the axis f f the winding may be applied directly to the body of the bobbin without interference from the axle pins. This facilitates the original construction of the armature, and also facilitates its repair.

In the modifications shown in Figs. 5 and 6 the head pieces 5 and 0 carry the axle pins (Z and e at one extremity, and at the other extremity merge into the body portion without any overhang, so that the previously wound coil may he slipped into place as shown. In this case it is preferable to curve the coil-carrying part of the bobbin as indicated in these figures.

It will be observed that in all figures the axis of the coil carrying body portion is angu-larly disposed with respect to the axis of rotation, z'. 6., the axis of the axle pins. The result is that the coil may be wound or slipped upon the coil carrying portion without encountering the axle pins, and yet, by reason of the angular relation of the axis of the body portion with respect to the axis of the axle pins, the body-portion lies directly in the magnetic path from one pole-piece of the magnetic frame to the other, and the head pieces fill the gap between the body-portion and the faces of the pole-pieces of the magnet frame, so that the magnetic path is substantially the same as in the ordinary form of double-T bobbin. In Figs. 1 and 3 the inclination of the axis of the body portion is such as to make possible the Winding of the coil in a lathe, While in Figs. 5 and 6, in which the construction is such as to permit the slipping on of a previously Wound coil, the inclination and relative arrangement of the head pieces doe-s not, permit Winding on a lathe, but where the axis of the body portion is at right angles to the axis of rotation, as in Fig. 6, the best magnetic path is secured.

Although, as has been pointed out, the armatures (including the axle pins) may, 1n

some cases be for ed or JI'GSSGCl or othera :3 l a 'Wise formed, from a single piece of metal,

yet that is not essential to the invention, Which may be embodied in armatures made up of assembled parts, as will readily be understood.

7 If the armature is to be oscillated, in the usual manner, by means of a cam and blade springs, then the cam may be out directly upon the bobbin itself, as indicated at is in Figs. 1 and 3.

The modifications shown in Figs. 5 and 6, of the drawings form the subject-matter of a divisional application Serial No. 654694, filed October 14, 1911.

Having thus described my invention What I claim is:

1. A bobbin for magneto induction mae chines having head-pieces of magnetic material, a coil-carrying body portion connecting the head-pieces, the axis of the body portion being angularly disposed With respect to the axis of the axle pins, and axle pins extending from the head-pieces; substantially as described.

Copies 5: this patent may be obtained in 3. A bobbin for magneto induction machines comprising a coil-carrying body-por 'Wlllh flattened surfaces adapted to cooperate With blade springs; substantially as described.

5. A bobbin for magneto induction machines having head-pieces of magnetic material, a coil-carrying body portion connecting the head-pieces, a coil mounted on the body portion, and axle pins extending from the head-pieces, said head-pieces extending over said coil; substantially as described.

6. A bobbin for magneto induction machines having head-pieces of magnetic material, a coil carrying body portion connecting the head pieces, a coil mounted on the body portion, and axle pins extending from the head-pieces, both ends of each of said head-pieces extending over said coil; substantially as described.

7. A. bobbin for magneto induction machines having head-pieces, a coil-carrying body portion connecting the head pieces, a coil mounted on the body portion, and axle pins extending from the head-pieces in a direction inclined to the axis of the body portion, both ends of each of said head pieces extending over said coil; substantially as described.

In testimony whereof I have affixed my signature, in presence of two Witnesses.

GOTTLOB HONOLD.

'Witnesses ERNST ULMER, Max Ansorriirz.

five cents each, by addressing the Commissioner of Patents, Washington, D. O." 

